docs, readme: fix meeting time
docs, readme: fix meeting time

Last week we decided to move the meeting by one hour, so that people from
the US have a more convenient time to join the Cilium developer meeting.

Signed-off-by: Daniel Borkmann <3d0f3b9ddcacec30c4008c5e030e6c13a478cb4f@iogearbox.net>

scanf/cilium,mskarbek/cilium,cilium/cilium,mskarbek/cilium,scanf/cilium,eloycoto/cilium,eloycoto/cilium,tklauser/cilium,tklauser/cilium,tgraf/cilium,mskarbek/cilium,tklauser/cilium,mskarbek/cilium,tklauser/cilium,scanf/cilium,eloycoto/cilium,gumpt/cilium,tgraf/cilium,tklauser/cilium,gumpt/cilium,tgraf/cilium,scanf/cilium,tgraf/cilium,cilium/cilium,gumpt/cilium,mskarbek/cilium,gumpt/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium-team/cilium,cilium/cilium,tgraf/cilium,scanf/cilium,gumpt/cilium,gumpt/cilium,tgraf/cilium,gumpt/cilium,michi-covalent/cilium,cilium-team/cilium,eloycoto/cilium,cilium/cilium,scanf/cilium,eloycoto/cilium,scanf/cilium,michi-covalent/cilium,cilium/cilium,mskarbek/cilium,eloycoto/cilium,michi-covalent/cilium,eloycoto/cilium